Home » Phillips Countersunk Screws (GB819-2016 / DIN 965H / EN ISO 7046-2) - Steel (4.8) - Bright Zinc Plated

Phillips Countersunk Screws (GB819-2016 / DIN 965H / EN ISO 7046-2) - Steel (4.8) - Bright Zinc Plated

Phillips Countersunk Screws (GB819-2016 / DIN 965H / EN ISO 7046-2) — Low Carbon Steel, Class 4.8, Bright Zinc Plated (Cr3)

FULLERKREG Phillips countersunk head machine screws in low carbon steel, property class 4.8 are manufactured to the triple-standard specification of GB819-2016, DIN 965H, and EN ISO 7046-2. The 90° countersunk head with Phillips (Type H) cross recess delivers a clean flush-mount profile, making this series the most cost-effective choice for general-purpose fastening in light assemblies, consumer electronics, furniture, and sheet metal work. The bright trivalent zinc (Cr3) electroplating provides a shiny white appearance with reliable corrosion protection, fully compliant with RoHS and ELV directives — hexavalent-chromium-free.

Product Specifications

Attribute Detail
Product Name Phillips Countersunk Head Machine Screw
Standards GB819-2016 / DIN 965H / EN ISO 7046-2
Drive Type Phillips (Cross Recess, Type H)
Head Type Countersunk (Flat Head), 90° included angle
Material Low Carbon Steel
Property Class Class 4.8
Tensile Strength ≥ 420 MPa (min.)
Yield Strength ≥ 340 MPa (min.)
Surface Finish Bright Trivalent Zinc Electroplating (Cr3 / White Zinc)
Coating Thickness 5–12 μm (standard); custom thickness available
RoHS / ELV Compliance Yes — Hexavalent chromium (Cr6) free
Thread Type Metric Coarse Thread (ISO 68-1)
Thread Tolerance 6g per ISO 965-1
Size Range M1.6 – M10
Length Range 3 mm – 80 mm (size-dependent)
Head Angle 90°
Recess Type H (Phillips) per ISO 4757
Brand FULLERKREG

Material & Coating Overview

Property Detail
Base Material Low carbon steel (C ≤ 0.20%) — excellent formability, consistent cold-heading performance
Manufacturing Process Cold heading (cold forging) — no heat treatment required for Class 4.8
Plating Type Bright trivalent zinc (Cr3) electroplating — shiny white appearance
Salt Spray Resistance ≥ 48 hours (white rust) per ISO 9227 at standard 8 μm coating
Chromate Passivation Trivalent chromate (Cr3) — RoHS compliant, no Cr6+
Hydrogen Embrittlement Risk Low — Class 4.8 hardness below threshold; standard plating process applies
Operating Temperature -30°C to +120°C (coating integrity maintained)
Magnetic Yes (carbon steel)

Dimensional Data

All dimensions in millimeters (mm). Verified against GB819-2016 / DIN 965H / EN ISO 7046-2 standard drawings. dk = theoretical sharp head diameter; k = head height; a = thread run-out max; b = minimum thread length.

Thread Size Pitch (mm) dk max (mm) dk min (mm) k max (mm) k min (mm) a max (mm) b min (mm) Phillips Recess No. Approx. Unit Weight (g/100pcs)*
M1.6 0.35 3.0 2.7 0.96 0.74 0.7 — No.0 ~18
M2 0.40 3.8 3.5 1.20 0.94 0.8 — No.1 ~29
M2.5 0.45 4.7 4.4 1.50 1.20 0.9 — No.1 ~53
M3 0.50 5.6 5.3 1.65 1.35 1.0 12 No.1 ~84
M3.5 0.60 6.5 6.2 1.93 1.57 1.1 14 No.2 ~128
M4 0.70 7.5 7.2 2.20 1.80 1.2 14 No.2 ~183
M5 0.80 9.2 8.9 2.50 2.10 1.5 16 No.2 ~336
M6 1.00 11.0 10.7 3.00 2.60 1.8 18 No.3 ~582
M8 1.25 14.5 14.2 4.00 3.50 2.0 22 No.3 ~1,330
M10 1.50 18.0 17.7 5.00 4.40 2.3 26 No.4 ~2,756

* Unit weights are approximate reference values for low carbon steel (density ≈ 7.85 g/cm³) at nominal length, excluding coating. Actual weight varies by length. Contact FULLERKREG for certified weight data on specific lot sizes.

Standard Length Range by Size

Thread Size Available Lengths (mm) Fully Threaded Up To (mm)
M1.6 3, 4, 5, 6, 8, 10, 12, 16 Fully threaded throughout
M2 3, 4, 5, 6, 8, 10, 12, 16, 20 Fully threaded throughout
M2.5 4, 5, 6, 8, 10, 12, 16, 20, 25 Fully threaded throughout
M3 5, 6, 8, 10, 12, 16, 20, 25, 30, 35, 40 ≤ 30 mm
M3.5 6, 8, 10, 12, 16, 20, 25, 30, 35 ≤ 30 mm
M4 6, 8, 10, 12, 16, 20, 25, 30, 35, 40, 45, 50 ≤ 38 mm
M5 8, 10, 12, 16, 20, 25, 30, 35, 40, 45, 50, 55, 60 ≤ 38 mm
M6 10, 12, 16, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70 ≤ 38 mm
M8 12, 16, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 80 ≤ 38 mm
M10 16, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 80 ≤ 38 mm

Mechanical Properties — Class 4.8

Property Value Test Standard
Tensile Strength (Rm) ≥ 420 MPa ISO 898-1
Yield Strength / Proof Load (Rp0.2) ≥ 340 MPa ISO 898-1
Hardness 130–220 HV (max. 22 HRC) ISO 6507
Elongation at Break ≥ 14% ISO 898-1
Stress Under Proof Load 310 MPa ISO 898-1
Impact Strength Not specified for Class 4.8 ISO 898-1

Class 4.8 vs Class 8.8 — How to Choose

Property Class 4.8 (This Product) Class 8.8 (Alloy Steel)
Material Low carbon steel Alloy steel 10B21
Tensile Strength ≥ 420 MPa ≥ 800 MPa
Yield Strength ≥ 340 MPa ≥ 640 MPa
Heat Treatment None (cold headed) Quenched & tempered
Cost Lower — most economical option Higher
Best For Light assemblies, general fastening, low-load applications High-load structural & mechanical joints

Selection Guide

Application Scenario Recommended Size Reason
Consumer electronics & appliances M1.6 – M3 Lightweight, flush head, cost-effective for high-volume assembly
Furniture & cabinet assembly M3 – M5 Flush countersunk head, bright zinc finish, easy installation
Sheet metal enclosures & panels M3 – M6 Clean flush surface, vibration-resistant, economical
Lighting fixtures & signage M3 – M5 Bright zinc appearance, low-load fastening, flush aesthetic
Plastic & composite assemblies M2 – M4 Low clamping force avoids material cracking; flush head
General industrial fastening M3 – M10 Most cost-effective option for non-critical load applications
Packaging machinery & conveyors M4 – M8 Flush head prevents snagging; zinc coating resists mild corrosion

Standard Reference

These screws are manufactured in full compliance with the following international and national standards:

  • GB819-2016 — Chinese National Standard: Cross recessed countersunk head screws; specifies dimensions, tolerances, and mechanical properties for metric sizes M1.6–M10.
  • DIN 965H — German Standard: Cross-recessed countersunk flat head screws, Phillips recess type H; widely referenced in European and global industrial procurement.
  • EN ISO 7046-2 — European/International Standard: Cross-recessed countersunk flat head screws, recess type H (Phillips); covers property class 4.8 for carbon steel grades.
  • ISO 898-1 — Mechanical properties of fasteners made of carbon steel and alloy steel — Class 4.8 specification.
  • ISO 4042 — Electroplated coatings on threaded fasteners; governs zinc plating thickness and adhesion.

Thread tolerance: 6g per ISO 965-1. Head angle: 90°. Recess type: H (Phillips) per ISO 4757.

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Why Choose FULLERKREG?

  • 🏭 Direct Manufacturer — Factory-direct pricing with no middlemen markup
  • 📐 Triple-Standard Compliance — GB819-2016 / DIN 965H / EN ISO 7046-2 certified production
  • 💰 Most Economical Option — Class 4.8 low carbon steel offers the best price-to-performance ratio for general fastening
  • ✅ RoHS & ELV Compliant Coating — Bright trivalent Cr3 zinc plating — no hexavalent chromium (Cr6+)
  • 🔬 Full Material Traceability — Mill certificates and dimensional inspection reports available on request
  • 📦 Flexible MOQ & Packing — Bulk bags, plastic boxes, or reels; custom labeling and OEM packaging available
  • 🌍 Global Shipping — Reliable export logistics to 50+ countries with full documentation support
  • ⚡ Fast Lead Times — In-stock standard sizes ship within 3–5 business days
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